Ch 2 Encountering and probing the past Flashcards

Ant1000 World Archaeology

1
Q

A fluxate gradiometer is?

A

a device that
measures minor fluctuations
in the earth’s magnetic field
that may result from alterations in the soil,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

ground-penetrating radar (GPR) is?

A

an electromagnetic pulse is aimed into the ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

‘We can break archaeological evidence down into the following categories…..

A

artefacts, ecofacts, and human skeletons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does Trace Element Analysis tell us

A

Determines the geographic source of the materials

through the analysis of small or “trace” concentrations of elements or chemicals in those raw materials

shows where ancient people obtained their raw materials from

through a process called trace element analysis,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Neutron Activation

Analysis is?

A

Is a Form of trace element analysis.

When the artefacts’ chemistry matches that of a source area, it is concluded that the ancient people obtained the material from the chemically matching source.

NAA produces a chemical signature for a raw material by bombarding it with neutrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

X-Ray Fluorescence is a technique used for?

A

A technique for
identifying the chemical makeup
of a raw material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is experimental replication,

A

the process of attempting to

authentically re-create ancient artefacts,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Morphology:

A

Literally, the study of form.

An analysis of the shape and form of skeletons or artefacts.

morphology—its form, what it looked like

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

osteological comparative collections are?

A

bone libraries,

where ancient specimens can be compared to known, labelled specimens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Coprolites are?

A

Fossilized faeces,

useful in the
reconstruction of an ancient diet.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

PALYNOLOGY is?

A

Palynology is the identification of plants

through the remains of their pollen grains.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the C3 Pathway?

A

The photosynthetic process employed by most trees.
In the C3 pathway,
a radioactive isotope of carbon, 13C,
is differentially filtered out.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the C4 Pathway?

A

The photosynthetic process employed by most grasses and sedges.

In the C4 pathway,
the radioactive isotope of carbon, 13C,
is in higher concentrations

than in plants that follow the C3 pathway.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Epiphyseal Fusion:

A

The epiphyses of each long bone join to the diaphysis during the process of physical maturation.
(EPI-FIFI-SIS)
(DY-AF-A-SIS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Strontium isotope analysis, provides a useful way of measuring

A

Residential origins and migration patterns

of ancestral humans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When we are born, each of the long

bones is in three sections: What are they

A

a shaft, or diaphysis, (dia-fifi-sis)
two endcaps, or epiphyses. (epi-fifi-sis)

A process called epiphyseal fusion,
the shafts and endcaps fuse to one another during growth at more or less set times during our teen years;

this fusion reflects maturity and full growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Epiphyses are

A

The endcaps of the long bones.

The epiphyses join at the ends of the diaphysis of each long bone.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Paleopathology is

A

The study of

ancient disease, trauma, or dietary deficiency.

Hominin skeletons often bear evidence of these.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Mt Vesuvius erupted when?

A

79 A.D August 24

  • remained covered for 1500 yrs. until 1740

when workers digging a channel found the remains.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

When analysing artefacts what things are we wanting to know

A

where the raw material came from

how the items were made

how they were used

the social context in which they were made and used

21
Q

When 13C concentration is low, what dominated?

A

Trees

22
Q

Carbon Isotope Analysis is?

A

the analysis of c12 & C13

in a bone or soil sample.

It is useful in dietary and environmental reconstruction

because different plants and grasses use c12 and c13 differently

23
Q

Plants produce a non organic reside made up of microscopic mineral particles called?

A

Phytoliths (FIFA-LITHS)

microscopic siliceous particle forms by plants

Highly resistant to decomposition

unique to each plant species,

can tell what was growing in the area

24
Q

what are two types of Oxygen Isotopes

A

16O & 18O

O16 is lighter then o18
the lighter isotope evaporates faster

25
Q

when o16 in foram shells is low it indicates what?

A

the world temperature in cooling

26
Q

When O16 in foram shells is high it indicates what?

A

The world temperatures are warmer

27
Q

Human bones can tell us what?

A

How we walked

what kinds of climates they adapted too

what foods they were eating

the level of nutrition

what diseases and traumas were suffered

28
Q

What are some uniquely human features of human bones?

A

the position of the point of connection,

between the top of the spinal column and the base of the cranium,

this reflects the pattern of walking on 2 feet or four

29
Q

The Element Strontium (Sr) can be used to identify where you were born how?

A

By the levels of trace elements in the soil,

transfers into plants.. we eat them

teeth are formed and the enamel reflects the concentration of the isotopes

bones show trace elements for last 10 years

30
Q

What is Stratigraphic Layering?

A

The layering of the earths surface

31
Q

Radiometric dating is?

A

A dating technique

based on the known rates of decay
of several radioactive (unstable) isotopes
of common elements like
carbon, uranium and potassium/argon

32
Q

Any date where a year, or a range of years, can be applied to an site or artifact is called?

A

Absolute Date or chronometric,

meaning, literally, that in its application we are attempting to measure time

33
Q

Relative dating refers to

A

a date that

places fossils or a site

in a sequence with other specimens

34
Q

K/Ar dating is what?

A

Potassium Argon dating Argon/Argon dating is more accurate and relied on more often.

35
Q

Argon/Argon dating measures what?

A

the amount of Argon 40 build up in volcanic rock.

extremely accurate , to within .25% of the date of a known object

36
Q

What is the half life of potassium decay to argon?

A

1.25 Billion years

37
Q

Describe what the numbers mean in c12

A

there are 12 particles in the carbons atom’s nucleus
6 positively charged particles - protons
6 neutral particles - neutrons
this is a stable isotope

38
Q

what happens when solar particles smash into free neutrons, that then collide with nitrogen atoms in the earths atmosphere
what is created?

A

C14 carbon 14
14 particles in its nucleus
6 Protons and 8 neutrons
this is an unstable isotope

39
Q

Carbon dioxide is produce by combining what?

A

oxygen and C14 & C12

40
Q

what is the half life of C14?

A

5730 yrs

same as potassium

41
Q

What does C14 revert back too while its decaying?

A

its nitrogen atom from which it was formed

42
Q

What is the average length of time we can attribute C14 dating too?

A

50, 000 to 60,000 years

43
Q

Solar fluctuations cause variations in C14 production

describe this and what can be done to address this issue

A

more c14 production leads to dated items producing a younger age

Less c14 produces older dates

Calibration curves can address this issue

44
Q

What is a calibration curve and why is it useful

A

calibration curves come from the average age of deposited layers in a lake,

these carbon date ranges can then be converted into actual calendar years

45
Q

Dendrochronology is?

A

tree ring dating.

an extremely accurate biological dating technique

46
Q

What are the four factors that apply to Dendrochronology?

A
  1. Trees add growth every year.
  2. The width of the ring is controlled by environmental conditions e.g. rain or temperature
  3. the sequence of tree rings width over a long period of time is unique
  4. all trees in the same area reflect the same pattern of changes through time in tree ring width.
47
Q

Explain how the master sequence for tree rings works

A

by determining where the individual ring sequence overlaps with a master sequence, the life span of the tree can be fixed in time.

48
Q

What is Luminescence dating

A

measures the amount of energy that is trapped in material recovered at sites as a result of natural radioactive decay in the surrounding soil

by using heat to release the energy ( thermo-luminescence, TL) or by laser light( Optically Stimulated Luminescence, OSL)